The Flash brings back the character of Barry Allen first introduced on Arrow season 2. Barry wakes up after almost a year in a coma to find he has gained the ability of super speed. During The Flash panel at the Television Critics Association press tour, executive producers Andrew Kreisberg, Greg Berlanti and Geoff Johns talked about the show's mythology, division between the DC television and movie universes, DC easter eggs and a few of the recurring characters who will appear.

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Flash Mythology

"...we've incorporated almost everything from the mythology into it and added a whole new backstory with S.T.A.R. Labs and that team incorporated that. But it's probably the most faithful DC Comics adaptation ever, as deep as we're going to go and as many characters as we're using, especially in the first nine episodes we've planned out pretty tightly." - Johns

DC Television and Movie Universes are Distinct

"At DC, we really see film and TV as separate worlds. Arrow and Flash create a huge DC universe for us. And it's going to live and breathe and grow." - Johns

Wentworth Miller Cast as Leonard Snart a.k.a. Captain Cold

"Wentworth Miller will be playing Captain Cold in episode 4 of our show. And Leonard Snart, we'll be seeing his origin and the origin of the Rogues. That's an exciting piece of information that we wanted to introduce today." - Berlanti

John Wesley Shipp as Barry's Father

"As for John Wesley Shipp, all three of us are huge fans of the original Flash. Having all grown up Flash fans, that show meant the world to us and ended far too soon as far as the three of us were concerned. And Greg had worked with John on Dawson's Creek. He played Dawson's father. So when we were sitting down and talking about developing this series, all three of us were like, 'Whatever we do, we've got to get John Wesley Shipp.' It's not a cameo. He's playing one of the most important parts on the show. So much of what Barry is doing, he's doing for his father." - Kreisberg

Robbie Amell as Ronnie Raymond/Firestorm

"[Robbie Amell]'s going to be playing Ronnie Raymond, who comic book fans will know is one half of the hero known as Firestorm, who keeps popping up on the screen every once in a while. And he is going to portray Caitlin's fiancee, who we hear got blown up in the pilot." - Kreisberg

"[Ronnie Raymond] shows up in the third episode." - Berlanti

"I think as we evolve Firestorm, ... you'll meet Stein. We actually had him in a version of the pilot at one point on the train with Barry coming back from when he was coming back from Starling. And so he'll be there that day." - Berlanti

DC Easter Eggs

"... we want to do the best TV show, television series we can possibly do with the DC universe with these characters. And one of the Easter eggs in the pilot is we see Gorilla Grodd's cage empty. Have you figured out how in the world you're going to make that work on TV?" - Johns

"Well, it's funny, because obviously that Easter egg means the world to us. And all along the way, there are people who are less familiar with the mythology, who were like, well, we could save ten seconds if we cut that. And we're like, nnnn, you can cut anything else. You know, "Dawn of the Planet of the Apes" is out now, and hopefully they're doing the R&D for us so that one day we can see exactly what jumped out of that cage." - Kreisberg